Question: Without using trigonometric tables, evaluate the following: cos 20 + cos270 sec 50 - cot? 40 +2cosec258 -2cot 58 tan 32 -4tan 13 tan

Without using trigonometric tables, evaluate the following: cos 20 + cos270 sec

Without using trigonometric tables, evaluate the following: cos 20 + cos270 sec 50 - cot? 40 +2cosec258 -2cot 58 tan 32 -4tan 13 tan 37 tan 45 tan 53 tan 77. [CBSE

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